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Discuss combi boiler not kicking in in the Plumbing Forum area at PlumbersForums.net

Trampy

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Hi all,
i'm relatively new to the world of plumbing and bathroom fitting.
I've recently fitted a bathroom and the new basin tap (Bristan Orta Mixer) wont kick in the boiler when the hot is turned on. The new bath mixer and the existing kitchen tap work fine although the hot has to be turned fully on to kick the boiler in.
Is this likely to be a flow issue as the pressure in the new basin tap is pretty poor. I've not changed any of the existing pipework, I've used full bore isolating valves and have ensured that the tap tails aren't twisted or kinked. I also dismantled the tap and made sure the filters were clear.
Or could it be an issue with the boiler?
cheers
 

bogrodder

Plumber
GSR
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You say filters, have you cleaned the aerating insert on the tap outlet spout?
 

Gasmk1

GSR
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Try it without the spout insert see if it works as some do really restrict the flow
 

Stu-B

Active Member
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Sounds like a boiler problem to me if you need to open the hot fully in the other taps to get it to fire, what’s the cold flow rate like?
 

CBW1982

Plumber
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Have you checked that you opened the stopcock fully? As everyone else, check your flow rates.
 
OP
T

Trampy

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Try it without the spout insert see if it works as some do really restrict the flow
So I removed the spout insert and the water came gushing out and the boiler kicked in!! But water now splashes all over the bathroom I’ve seen online you can get an adjustable aerator spout insert, are these any good? Or am I just going to get the same problems of either too low flow or water splashing everywhere?
 
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Trampy

New Member
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Sounds like a boiler problem to me if you need to open the hot fully in the other taps to get it to fire, what’s the cold flow rate like?
Yes, I was thinking the same. The cold flow is good on the kitchen tap. It’s a messed up system though because the colds in the bathroom are tank fed.
 

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